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54 lines
1.1 KiB
Go
54 lines
1.1 KiB
Go
package parser
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import (
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"errors"
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"github.com/usememos/memos/plugin/gomark/ast"
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"github.com/usememos/memos/plugin/gomark/parser/tokenizer"
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)
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type SuperscriptParser struct{}
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func NewSuperscriptParser() *SuperscriptParser {
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return &SuperscriptParser{}
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}
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func (*SuperscriptParser) Match(tokens []*tokenizer.Token) (int, bool) {
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if len(tokens) < 3 {
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return 0, false
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}
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if tokens[0].Type != tokenizer.Caret {
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return 0, false
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}
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contentTokens := []*tokenizer.Token{}
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matched := false
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for _, token := range tokens[1:] {
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if token.Type == tokenizer.Newline {
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return 0, false
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}
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if token.Type == tokenizer.Caret {
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matched = true
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break
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}
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contentTokens = append(contentTokens, token)
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}
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if !matched || len(contentTokens) == 0 {
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return 0, false
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}
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return len(contentTokens) + 2, true
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}
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func (p *SuperscriptParser) Parse(tokens []*tokenizer.Token) (ast.Node, error) {
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size, ok := p.Match(tokens)
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if size == 0 || !ok {
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return nil, errors.New("not matched")
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}
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contentTokens := tokens[1 : size-1]
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return &ast.Superscript{
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Content: tokenizer.Stringify(contentTokens),
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}, nil
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}
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